Article 6213

Title of the article

CUTTER WEAR ESTIMATION BY VIBROACUSTIC METHOD AND SIMULATION OF ACOUSTIC FILED
INTENSITY INSIDE THE CUTTING TOOL 

Authors

Dobrovinskiy Igor' Ruvimovich, Doctor of engineering sciences, professor, sub-department of information measuring technology, Penza State University (Penza, 40 Krasnaya str.), idobr@tl.ru
Medvedik Yuriy Timofeevich, Candidate of engineering sciences, senior lecturer, sub-department of electrical
engineering and transport electrical equipment, Penza State University (Penza, 40 Krasnaya str.), yura.medvedik@mail.ru
Medvedik Mikhail Yur'evich, Candidate of physical and mathematical sciences, associate professor, sub-department of mathematics and supercomputer modeling, Penza State University (Penza, 40 Krasnaya str.), medv@mail.ru
Chapaev Vyacheslav Sergeevich, Candidate of engineering sciences, associate professor, sub-department of electrical engineering and transport electrical equipment, Penza State University (Penza, 40 Krasnaya str.), chapaev@mail.ru 

Index UDK

621.317.08 

Abstract

The researchers suggest a new vibroacoustic method for measuring the wear of cutting tools using three-stroke integration for machine tools with computer numerical control (CNC). Double glazing vibroacoustic device improves the accuracy of the tool’s cutting edge by suppressing two uncorrelated to each other noise frequencies. The integration is performed over two equal first strokes, the time period of which is multiple of the first power line disturbance. Therefore, the voltage with the frequency of the first disturbance ωp1 in the moments after the first two strokes will be completely suppressed. Having the length of the interval of shift time of two strokes being half the voltage period of the second disturbance frequency ωp2 (workpiece rotation), by the end of the second measure of integration the disturbance voltage frequency will be suppressed as well. During the third stroke there occurs the discharge of the feedback capacitor of the integrator by the voltage from the reference source. It fulfils the “voltage-time” conversion. By filling the interval of a third stroke with pulses of exemplary frequency T0, we obtain the digital equivalent of NX voltage of the tool’s cutting edge state. The possibility of instrument wear estimation by the vibroacustic method is proved experimentally and by mathematical modeling of acustic fields of a sharp or worn cutter. 

Key words

measurement of cutting tool wear, mathematic modeling, three-stroke integration, subhierarchic method. 

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References

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Дата создания: 28.08.2014 10:31
Дата обновления: 28.08.2014 11:10